Games like Tunnel Brawl
Games like Tunnel Brawl include PUBG: BATTLEGROUNDS, Deployment, Halo: Spartan Assault, World of Warships, and Snake Force. We matched them by the tags players give Tunnel Brawl on Steam (Arena Shooter, Strategy, Top-Down Shooter, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.

PUBG: BATTLEGROUNDS
Shared: Shooter · PvP · Action

Deployment
Shared: Arena Shooter · Top-Down Shooter · Shooter

Halo: Spartan Assault
Shared: Top-Down Shooter · Action · Strategy

World of Warships
Shared: Shooter · PvP · 3D

Snake Force
Shared: Top-Down Shooter · Shooter · Action

ShellShock Live
Shared: Strategy · Shooter · Action

THE FINALS
Shared: Shooter · PvP · Arena Shooter

Counter-Strike: Source
Shared: Shooter · Action · PvP

UpGun
Shared: Shooter · PvP · Arena Shooter

ACE COMBAT™ 7: SKIES UNKNOWN
Shared: Shooter · Arcade · PvP

Silica
Shared: Strategy · Shooter · PvP

Deep Rock Galactic: Survivor
Shared: Top-Down Shooter · Arena Shooter · Top-Down

Apewar
Shared: Shooter · Arena Shooter · Action

Children of the Sun
Shared: Strategy · Action · Shooter

Police Stories
Shared: Strategy · Action · Top-Down Shooter

Marvel Rivals
Shared: PvP · Action · Shooter

BRAZILIAN DRUG DEALER 3: I OPENED A PORTAL TO HELL IN THE FAVELA TRYING TO REVIVE MIT AIA I NEED TO CLOSE IT
Shared: Arena Shooter · PvP · Shooter

Verdun
Shared: Shooter · PvP · Action

Door Kickers
Shared: Strategy · Action · Top-Down

Pixel Gun 3D: PC Edition
Shared: PvP · Shooter · Action

SNKRX
Shared: Arena Shooter · Top-Down Shooter · Arcade

RUNNING WITH RIFLES
Shared: Top-Down Shooter · Action · Top-Down

Apex Legends™
Shared: Shooter · PvP · Action

Arma 3
Shared: Shooter · Action · PvP